@conference {Charalampos_Vasilatos_13908355,
	title = {Mixture of Lignite Fly Ash in Concrete: Physical and Mineralogical Characterization{\textendash}Case Study from Ptolemais, Northern Greece},
	booktitle = {World of Coal Ash (WOCA) Conference, Lexington, Kentucky, USA},
	year = {2005},
	author = {Vasilatos, Charalampos}
}
